Servidores DNS Principal (mname) y Secundario (rname)
host: ndxa.net
class: IN
ttl: 3600
type: SOA
mname: ns1.value-domain.com
rname: hostmaster.ndxa.net
serial: 2021020914
refresh: 3600
retry: 900
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: ndxa.net
class: IN
ttl: 3600
type: MX
pri: 10
target: mx1.ndxa.net